Interaction between pyrite and cysteine

• Published in: Transactions of Nonferrous Metals Society of China Vol. 16; no. 4; pp. 943 - 946
• Main Author: 柳建设 王兆慧 李邦梅 张艳华
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.08.2006; School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China
• Subjects: adsorption isotherm; adsorption mechanism; cysteine; lattice constant; pyrite; XRD; 半胱氨酸; 吸附机理; 吸附等温线; 黄铁矿; adsorption isotherm; pyrite; adsorption mechanism; lattice constant; cysteine
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(06)60356-7

The adsorption mechanism of cysteine on pyrite was studied by amounts adsorbed, FTIR and XRD measurements. The results obtained by adsorption experiment suggest that as the mass ratio of mineral to cysteine mp/mc is greater than 5, the amounts adsorbed on mineral is stable after adsorption for 15 min and cysteine adsorbing with mp/mc shows the same tendency. It can he inferred by its Langmuir-type adsorption isotherm that chemical interaction governs the entire adsorption process. The results from FTIR and XRD prove that the functional groups of cysteine appear with blue shift of their characteristic adsorption peak in FTIR spectrum; meanwhile, the lattice constant obviously decreases and the widening of crystal planes such as （210）, （220） and （211） is found after cysteine adsorbing on mineral.